1 Samuel 29:2-3

2And the lords of the Philistines were proceeding on by hundreds and by thousands, and 1David and his men were proceeding on in the rear with Achish.

3Then the commanders of the Philistines said, “What are these Hebrews doing here?” And Achish said to the commanders of the Philistines, “Is this not David, the servant of Saul the king of Israel, 2who has been with me these days, or rather these years, and 3I have found no fault in him from the day he 4deserted to me to this day?”